Telescopic gun-sight.



O. GEAUHEDING. TELESCOPE GUN SIGHT. APPLIUATIOH FILED JUNE 1, 1911.

Patented Sept. 26, 1911.

M NESEES fire:

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WAAEEN- GSZ'tPORATION 0F GERMANY.

UIII'D DEELSCHINENFAB EZIK, 0F DUSSELDOE'E-DEEENDORF, GER'MAITZ, fi

TELESCOEE GUN-SIGHT).

Application fileri June 1, 1911.

To all 207mm it may concern:

Be it known that 1, Oscar: GRAUHEDING, engineer, a subject of the German Emperor, residing at 27 l ischerstrasse, Dusseldorf, Germany, have invented certain new and useful Improvements in Telescope Gun- Sightsg'and I do hereby declare the following to he a full, clear, and exact description oil the invention, such as will enable others skilled in the art to which it appertains to make and use the same. p

it has been previously proposed to adjust the sighting: point in telescope gun sights by means of the intersection. of two lines or curves, which can he relatively displaced.

The present invention relates to an arrangement of such telescope sights, in which the sighting point is determined by the intersection of a vertical line on a lixed plate "w th a curve marked on a second plate, which is capahlc of rotation about an axis eccentric to the optic axis of the telescope. The rotating plate has on its circuuil *ence a scale of gun ranges and the eccentric disposition of this plate enahles only a small portion of the curve to come into the field of view at any time, which portion corresponds to the given range. 'lhe eccentric disposition of the plate also allows its diameter to he greater. than that of the eye piece, with outthc scale hcing out of the field of view. This allows of a much more open scale, since it the systcn'i is concentric the diameter of the scale must he smalicr than the eyepiece to permit all parts or the scale to he in the held of view. Also with the conccnlric arrangcu'ient it is not possihlc to make use ol points of i11tcrr-ection spread all ovcr lhc iield. of View, hut only those which accoi'tlli'i; to the position o'l the curve lie eithcr in the upper or lower hall ol the field, so that only hall the latter can he utilized lot the re quircd changcs in the sighting point. The present arrange cuicnt on the other hand utiliz'es the wliolc held for this purposc.

The invention will he hcrcinallcr l'ully sci orth and 'iarticuhzrly poinlcd out in the 'lfhc accompanying drawings illustrate hy way oil example a mnstruclion according to thcinvcntion in which .Figure '1 is a side elevation and Fig. 2 an end elevation of the eye picccgit a telescope fittedwiththc lixcd and movable plates.

Specification of Letters Iiatent.

atentetl'Sept. 26., 1913.

Serial No. 636,648.

In the eye piece a is the fixed glass plate which carries the vertical line I) and also the second circular glass plate 0, whose axis of rotation is eccentric to the optic axis of the telescope. The curve (Z is marked on the second plate and forinsan intersecting point with the vertical line. The curve is so con structed, that the point of intersection corresponds to the elevation of the gun, when the plate is adjusted to the given range marked on its circumference. The points OI intersection are consequently sighting points. The range is read on a scale c marked on the circumference of the rotatable glass plate and the portion of the scale in use at any time comes into the field of view and. is set iv the vertical line 7). The curve d is conructed so that equal divisions correspond to unequal re cal displacements. The drift due to the rilling of the gun can he compensated by replacing the Vertical line by a curve f shown dotted in l i Since the elevation required for a given range Varies with different types of guns several scales can he provided for this purpose. The edge of the plate is external to the telescope for the greater part of the circumference and is niill ed for convenience of rotation.

l ciainrl. A telescope gun sight wherein. the sighting point is dctern'iined by the intersection of a vertical line with a curved line, com- 'irising a lixcd plate and an adjustable plate, the vertical line hciug' on one plate and the curved line on the other. said adjustable plalc hciug capahlc ol. hcing turned on an axis c ctmtiic to the optic axis of the other plate.

2. A itlUHl'HiHi gun sight wherein the sighting point is determined, hy the intersection of a vertical line with a curved line, coinprising a fixed plate having a vertical line, and an adjustable plate having a. curved. line, said adiustahlc plate hcing capahle oif hcin a' turncd ahout an axis eccentric to the optic axis of the lixed plate.

telescope gun sight wherein the sight.- in; point is dctcrniii'icd hy ihc intersection of a. vertical line with a curved line, comprising a fixed plate having a vertical line, and an adjuslahle plate having a curved line, said adjustahlc plate also having a scale with divisions corresponding to the range l -,'isihlc in the field ofview, and capable of coinciding with the vertical line on the fixed plate.

h ln a telescope gun sight wherein the sighting pointis determined by the intersection of a vertical line with a curved line, comprising a fixed plate having a vertical line, and an adjustable plate having a curved line equal divisions of which correspond to unequal vertical displacements.

5. A telescope gun sight wherein the sighting point is determined by the intersection of a vertical line with a curved line, co1nprising a plate having a vertical line, and a second plate having a curved line, one of said plates having a range scale, and the po- 1 sition of one plate being capable of being adjusted relatively to the other so that only portions of the range scale which correspond to the range set appear in the field of view.

y In testimony whereof, I have signed this specification in the-presence of two subscribing witnesses.

' OSCAR GRAUHEDING. [L. 5.] Witnesses ALFRED HENKEL,

ALBERT F. NUFER. 

